Mortising plane



D 1951 w. A. DOHMEY'ER MQRTISING PLANE Filed June 172, 1948 7W. M w. w m

Patented Dec. 25, 1 951 MORTISING PLANE WilbertAugusttnohmeyer, Crete, 11L, assignor of one-fifth to Eugene Wis.

Simpson, Milwaukee,

ApplicationJunefl, l948,-.Serial N0. 33,635

. 4.,Cl aims. (Cl. 145

This invention relates to planesand more particularly to a mortising plane.

When it is desired to mortise an aperture in a door to receive a hinge,,it is customary to use a chisel and out vertically to the depth of the hinge at both ends, then use the chisel to remove the material between the cuts This procedure is slow andleaves a rather rough base for the hinge which may result in uneven hanging.

It is an object of the present invention to provide a plane which will remove the. material be tween the vertical cuts and leave a smooth base for the hinge.

A further object of the invention is to provide a plane which will enable the user to work .toa definite hinge width and. thickness.

Afurther object is to provide a plane which may be conveniently. operated in either direction.

A stillfurther object is to provide a plane which is readily assembled.

Another object is to provide a plane guard which will protect the blade duringtimes of nonuse.

A further object is toprovide a tool which will reduce the time required to mortise joints.

A still further object is to provide a plane for mortising joints which will be economical to manufacture.

A still further object is to provide a plane which will enable the user to see the area on which he is Working.

Other objects will become apparent when considering the following specification, which, when taken in conjunction with the accompanying drawings, illustrate a preferred form of the invention.

In the drawings:

Figure 1 is a plan view of a plane embodying the present invention;

Figure 2 is a side elevational view of the plane shown in Figure 1 with a blade guard attached thereto;

Figure 3 is a cross-sectional view taken on the line III-III of Figure 1 looking in the direction of the arrows;

Figures 4 and 5 are cross sections on the line IV-IV and V-V, respectively, of Figure 2 looking in the direction of the arrows.

Referring to the drawings, the plane is built with a body I ii composed of a bed H having a smooth, fiat bottom and sides i2-|2 extending at right angles to the bed I! and parallel to each other. An elongated aperture I3 is provided through the bed to accommodate the blade.

The bed has a vertical standard 14 formed thereon whichhasa recess I5 to receive ablade Hi. The blade which is considerably narrower than the plane or the opening l3 rests in the recess l5 and in a similar recess I? (Figure 5) formed in the base of theupper side of the bed.

of the plane. The recesses I5 and I7 arethe width of the plane blade so that the blade is automatically centered in the plane. Thejblade i6 is made considerably narrower than the opening |3-so that the line marking the width-of the hinge is clearly visible through the opening, i3

The blade is held between the grooves i5 and.

IT by a frog la. The: frog is pivotally mounted on an axis 20 so as to swing about the axis and contact the bladeadjacent the'l'ower support. A screw 2| engages a threaded holein the frog and secures the upper end of the blade at a jacent the standard 14.

Suitable handles 23-43 are provided for the plane, one at eitherend thereof.

The plane may also be provided, if desired,

with a plane guard 25, which may comprise a woodblock substantially the-size of the pl-anebed having ears 26 contacting the sides of the plane. and snaps 2|21 engageable over the ends of the .plane. An aperture 28 through the guard 25 receives the blade i6 and protects it from injury. In operation The hinge is spotted on the door or door jamb and suitably marked. A chisel is used to make the vertical end cuts. The plane is then set for the thickness of the hinge and the chips: planed out to give a perfect mortise having a smooth, even base of uniform depth.

The enlarged aperture I3 permits following the line marking the hinge width while the rather long nose of the plane and the long heel of the plane assures that the bed of the plane constantly contact the work piece to give a uniform depth of out.

When the plane is stored, the guard 25 may be attached to protect the blade it from damage.

It will be understood that the heretofore described form of the invention is to be taken merely as a preferred embodiment thereof and that various changes in size, shape, and arrangement of parts may be made without departing from the spirit of the invention or the scope of the subjoined claims.

That which is claimed as new and is desired to be secured by United States Letters Patent, is:

1. A butt mortise plane of the character described comprising, a plane bed having a substantially rectangular opening elongated in the point ad direction of the length of the plane intermediate the ends of said bed, a blade support carried by said bed and extending thereabove, a blade of less width than said opening carried on said blade support and adapted to project through said opening, a pair of side plates formed on the oppositelongitudinal sides of said plane bed, said side plates tapering upwardly from the forward end of the plane, a pin supported between said side plates, a blade clamp carried by said pin adapted to secure the blade in position on the support whereby the elongated opening and the tapered side permit ready visibility of the cut to be made.

2. A butt mortise plane of the character described comprising, a plane bed having an opening elongated in the direction of .the length of the plane intermediate the ends of said bed, a blade support carried by said bed and extending thereabove, a blade of less width than said openingc'arried on said blade support at an acute angle to the plane of said bed and adapted to project through said opening, a pair of side plates formed on the opposite longitudinal side 'of said plane bed, said side plates tapering upwardly from the forward end of the plane, a pin supported between said side plates adjacent the upper part thereof, a blade clamp secured by said pin and adapted to clamp the blade in adjusted position, and a handle secured to the upper side of said plane bed in front of said opening whereby the elongated opening and tapered sides permit ready visibility of the cut to be made. 7 v

3. A'butt mortise plane of the character described comprising, a-plane bed having an opening elongated in the direction of the length of the plane intermediate the ends of said bed, a blade support carried by said bed and extending thereabove, a blade of less width than said opening carried on said blade support at an acute angle to the plane of said bed and adapted to project through said opening, a pair of side plates formed on the opposite longitudinal side of said plane bed, said side plates tapering upwardly from the forward end of the plane, a pin supported between said side plates adjacent the upper part thereof, a blade clamp secured bysaid pin and adapted to clamp the blade in adjusted position, a handle secured to the upper side of said plane bed in front of said opening, a second handle secured to the upper side of said plane bed to the rear of said blade whereby the elongated opening and tapered sides permit ready visibility of the cut to be made. 7

4. A butt mortise plane of the character described comprising, a plane bed having an open ing therein elongated in the direction of length of the plane and intermediate the ends of the bed, a plane blade of less width than said opening, a blade support carried from said bed and 7 Number adapted to support the blade at an acute angle to the bed with the cutting edge of the blade extending through said opening, a pair of side plates formedone on each longitudinal edge of the plane bed and tapering upwardly from the forward end of the plane to a maximum height past the said opening whereby the view through the opening is unobstructed, and means to secure the blade in fixed adjusted position on the support.

WILBERT AUGUST DOHMEYER;

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Name Date 121,406 Palmer et al Nov. 28, 1891 750,189 Haydock Jan. 19, 1904 1,032,346 Schade July 9, 1912 1,195,799 Fink Aug. 22, 1916 1,557,204 Kenney Oct. 13, 1925 FOREIGN PATENTS Number Country Date Denmark Oct. 21, 1929' 

